Whe you have and error in Sharepoint that says that a Web Part or Web Form Control on this Web Part Page cannot be displayed.
You have to remove the Web Part thats causing the error.
In order to do this, simply append “?contents=1” to the URL of the page, for example http://myportal/myarea/default.aspx?contents=1, and you will have a Sharepoint Web Part Page Maintenance where you can remove the Web Part that is causing the error.
